Molly : "What if every single one of your ill-informed unsophisticated opinions about me were wrong?"
Charlie : "I'd be amazed."
Charlie bought Molly's book as soon as he read her indictment and knew that she was his potential new client. He is certain that in order to commit the crimes she has committed, she must be a certain kind of person, and that is not a person who is particularly genteel, classy or recognizable from his own social circle. He is also a typical attorney in that he assumes his own opinions of a person are the correct ones.
Molly has also gone out of her way to portray herself in a particular image, but this is not necessarily a realistic portrayal. There is far more to her than meets the eye and a great deal more to her than is written in the indictment against her that Charlie is basing his opinion on.
You spent eight years running the world's most exclusive, glamorous and decadent man cave.
The reason for the success of Molly's poker games is that she was offering wealthy, influential men the opportunity to do whatever they wanted with impunity. Her poker room was their man cave where they could take solace from the world, drink the best top shelf liquor, gamble and enjoy the company of gorgeous women. There was absolutely no way in which this could not be successful, yet if it was to translate into a successful book, and entertain the regular man or woman in the street, Molly would have to be willing to name the men who had taken part.